Design And Realization Of Automatic Fire Alarm System

In the recent years, increasing of modern buildings leads to frequency of fire. While modern buildings take on smart character. The fire alarm system (FAS) is in charge of detecting and alarming fire in time, safeguarding beings and belongings. FAS has been a necessary setting in industrial and civilian buildings.This article focuses on the bus-type fire alarm system, which supply to detector, receive, transfer and display fire alarm signals, send the fire control devices control signals automatically. This paper makes in-depth research in the theory of FAC and expatiates the hardware and software method . In main and slave nodes AT89C52 is used as the MCU. In order to communicate, the CAN interface is designed, In addition, the main node included clock module, EEPROM memory module, serial communication module, decoding module, LCD modules; following nodes included sensors and performing devices. The main node used DS1302, AT24C16 and NS12232A LCD Module. The slave nodes used DS18B20 as temperature sensor and NIS-09C as smoke sensors, and used solenoid valve stepper motor as the implement devices.System makes a lot of improvement on traditional fire alarm system. It main show: The traditional fire alarm system used the RS-485, this system can cause correspondence to be more reliable, stably, selects CAN bus; The devices in the fire, we replace the solenoid valve of the sprinkler device physics; Using temperature sensor and the sensor matching use in the scene monitors the scene environmental information together, establishes the effective early fire detection method, realizes the early fire detection warning goal.The developing system of fire alarm controller's goal is to develop set of structures to be simple, easy to operate, fights fire the prompt fire warning intelligent control system. Research and test show that the system can meet the practical requirements for fire monitoring, to achieve our design objectives.